shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC15XX/gpio_api.c@227:7bd0639b8911, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 16:00:09 2014 +0100
Revision:
227:7bd0639b8911
Parent:
113:65a335a675de 
Synchronized with git revision d58d532ebc0e0a96f4fffb8edefc082b71b964af



Full URL: https://github.com/mbedmicro/mbed/commit/d58d532ebc0e0a96f4fffb8edefc082b71b964af/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 103:9b881da47c92 1 /* mbed Microcontroller Library
mbed_official 103:9b881da47c92 2 * Copyright (c) 2006-2014 ARM Limited
mbed_official 103:9b881da47c92 3 *
mbed_official 103:9b881da47c92 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 103:9b881da47c92 5 * you may not use this file except in compliance with the License.
mbed_official 103:9b881da47c92 6 * You may obtain a copy of the License at
mbed_official 103:9b881da47c92 7 *
mbed_official 103:9b881da47c92 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 103:9b881da47c92 9 *
mbed_official 103:9b881da47c92 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 103:9b881da47c92 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 103:9b881da47c92 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 103:9b881da47c92 13 * See the License for the specific language governing permissions and
mbed_official 103:9b881da47c92 14 * limitations under the License.
mbed_official 103:9b881da47c92 15 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
mbed_official 103:9b881da47c92 17 #include "gpio_api.h"
mbed_official 103:9b881da47c92 18 #include "pinmap.h"
mbed_official 103:9b881da47c92 19
mbed_official 103:9b881da47c92 20 static int gpio_enabled = 0;
mbed_official 103:9b881da47c92 21
mbed_official 103:9b881da47c92 22 static void gpio_enable(void) {
mbed_official 103:9b881da47c92 23 gpio_enabled = 1;
mbed_official 103:9b881da47c92 24
mbed_official 103:9b881da47c92 25 /* Enable AHB clock to the GPIO0/1/2 and IOCON domain. */
mbed_official 103:9b881da47c92 26 LPC_SYSCON->SYSAHBCLKCTRL0 |= (0xFUL << 13);
mbed_official 103:9b881da47c92 27 }
mbed_official 103:9b881da47c92 28
mbed_official 103:9b881da47c92 29 uint32_t gpio_set(PinName pin) {
mbed_official 227:7bd0639b8911 30 MBED_ASSERT(pin != (PinName)NC);
mbed_official 103:9b881da47c92 31 if (!gpio_enabled)
mbed_official 103:9b881da47c92 32 gpio_enable();
mbed_official 103:9b881da47c92 33
mbed_official 103:9b881da47c92 34 return (1UL << ((int)pin & 0x1f));
mbed_official 103:9b881da47c92 35 }
mbed_official 103:9b881da47c92 36
mbed_official 113:65a335a675de 37 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 103:9b881da47c92 38 obj->pin = pin;
mbed_official 227:7bd0639b8911 39 if (pin == (PinName)NC)
mbed_official 227:7bd0639b8911 40 return;
mbed_official 227:7bd0639b8911 41
mbed_official 103:9b881da47c92 42 obj->mask = gpio_set(pin);
mbed_official 103:9b881da47c92 43
mbed_official 103:9b881da47c92 44 unsigned int port = (unsigned int)(pin >> 5);
mbed_official 103:9b881da47c92 45
mbed_official 103:9b881da47c92 46 obj->reg_set = &LPC_GPIO_PORT->SET[port];
mbed_official 103:9b881da47c92 47 obj->reg_clr = &LPC_GPIO_PORT->CLR[port];
mbed_official 103:9b881da47c92 48 obj->reg_in = &LPC_GPIO_PORT->PIN[port];
mbed_official 103:9b881da47c92 49 obj->reg_dir = &LPC_GPIO_PORT->DIR[port];
mbed_official 103:9b881da47c92 50 }
mbed_official 103:9b881da47c92 51
mbed_official 103:9b881da47c92 52 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 103:9b881da47c92 53 pin_mode(obj->pin, mode);
mbed_official 103:9b881da47c92 54 }
mbed_official 103:9b881da47c92 55
mbed_official 103:9b881da47c92 56 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 227:7bd0639b8911 57 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 103:9b881da47c92 58 switch (direction) {
mbed_official 227:7bd0639b8911 59 case PIN_INPUT :
mbed_official 227:7bd0639b8911 60 *obj->reg_dir &= ~obj->mask;
mbed_official 227:7bd0639b8911 61 break;
mbed_official 227:7bd0639b8911 62 case PIN_OUTPUT:
mbed_official 227:7bd0639b8911 63 *obj->reg_dir |= obj->mask;
mbed_official 227:7bd0639b8911 64 break;
mbed_official 103:9b881da47c92 65 }
mbed_official 103:9b881da47c92 66 }